Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:26:17 2012 Optimize a model with 1 rows, 149 columns and 149 nonzeros Model has 128 quadratic objective terms Presolve removed 0 rows and 23 columns Presolve time: 0.00s Presolved: 129 rows, 254 columns, 510 nonzeros Variable types: 0 continuous, 254 integer (253 binary) Found heuristic solution: objective 40.0000000 Root relaxation: objective 0.000000e+00, 157 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 33 40.00000 0.00000 100% - 0s H 0 0 31.0000000 0.00000 100% - 0s 0 0 0.00000 0 38 31.00000 0.00000 100% - 0s 0 0 0.00000 0 28 31.00000 0.00000 100% - 0s H 0 0 19.0000000 0.00000 100% - 0s H 0 0 17.0000000 0.00000 100% - 0s 0 0 0.00000 0 25 17.00000 0.00000 100% - 0s 0 0 0.00000 0 16 17.00000 0.00000 100% - 0s H 0 0 11.0000000 0.00000 100% - 0s H 0 0 10.0000000 0.00000 100% - 0s 0 0 0.00000 0 21 10.00000 0.00000 100% - 0s H 0 0 7.0000000 0.00000 100% - 0s 0 0 0.00000 0 15 7.00000 0.00000 100% - 0s 0 0 0.00000 0 17 7.00000 0.00000 100% - 0s 0 0 0.00000 0 17 7.00000 0.00000 100% - 0s H 0 0 6.0000000 0.00000 100% - 0s 0 2 0.00000 0 15 6.00000 0.00000 100% - 0s * 414 159 16 5.0000000 0.00000 100% 10.9 0s * 486 99 8 4.0000000 1.00000 75.0% 17.1 0s Cutting planes: Cover: 239 MIR: 2 Zero half: 1 Explored 590 nodes (13011 simplex iterations) in 0.24 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.000000000000e+00, best bound 4.000000000000e+00, gap 0.0%